Information System Security Officer (ISSO), Senior (On-Prem & Cloud)

Senior Information System Security Officer (ISSO)

AMERICAN SYSTEMS is seeking a Senior Information System Security Officer (ISSO) to manage RMF execution, authorization, and continuous monitoring for hybrid on-premises and cloud systems supporting classified government missions in Chantilly, VA.

This role is ideally suited for a security leader who is detail-oriented, highly organized, and confident guiding system owners and engineers through RMF execution, authorization decisions, and ongoing compliance in classified environments.

Responsibilities

As an AMERICAN SYSTEMS Senior ISSO, you will:

• Lead RMF execution for assigned systems from categorization through continuous monitoring.
• Maintain ICD 503 and FIPS 199 security artifacts supporting system authorization.
• Develop, update, and manage ATO packages and authorization documentation.
• Conduct or oversee daily audit log reviews for anomalous activity and report findings to the Government as soon as practical.
• Coordinate risk assessments and remediation activities with engineering teams.
• Enforce security policies and ensure ongoing compliance throughout the system lifecycle.
• Serve as the primary point of contact for security reporting to the COTR, CO, and Government security authorities.
• Support audits, inspections, reciprocity efforts, and CORA activities.
• Support Privileged User Program and IA Workforce reporting requirements.

Qualifications

• Active TS/SCI clearance and current polygraph (required to be considered)
• Bachelor's degree in Cybersecurity, Information Assurance, or a related STEM field
• 10+ years of experience in RMF execution, cybersecurity compliance, and governance
• DoD 8570/8140 IAM Level III certification (e.g., CISSP, CISM, or CCSP)
• Experience managing ATO packages and supporting continuous monitoring
• Exposure to and understanding of hardening cloud assets
• Strong working knowledge of ICD 503, NIST SP 800-53, and FIPS 199.
• Experience coordinating risk remediation across technical and operational teams.

Pay Transparency Statement

AMERICAN SYSTEMS is committed to pay transparency for our applicants and employee-owners. The salary range for this position is USD $165,000.00/Yr. - USD $195,000/Yr. Actual compensation will be determined based on several factors permitted by law. AMERICAN SYSTEMS provides for the welfare of its employees and their dependents through a comprehensive benefits program by offering healthcare benefits, paid leave, retirement plans, insurance programs, and education and training assistance.

EEO Statement

EEO Race/Sex/Disability Status/Veteran Status